I can learn a lot from this image - what an amazing combination of medium to create something so wonderful! I would suggest perhaps a little greater contrast, but I also understand that colored pencils don't tend to be the most vivid things in the world (or at least when I work with them XD). I am in absolute shock in how those scales are so exactly defined, along with such delicate reflection... you really have a lot of skill with this. How long have you worked with scales? I am curious - I hope to become as good as this in time. Fantastic work!!